Re: jitter testing

[markus sesser <markus () sesser eu>]

i tested also with iperf
i've done the tests in the same network but results are different to my 
ping tests

[  3]  0.0-10.0 sec  11.5 MBytes  9.66 Mbits/sec  0.001 ms  284/ 8504 (3.3%)
[  3]  0.0-60.0 sec  68.6 MBytes  9.59 Mbits/sec  0.002 ms 2067/51021 (4.1%)
[  3]  0.0-60.0 sec  68.8 MBytes  9.61 Mbits/sec  0.001 ms 7068/56120 (13%)
[  3]  0.0-60.0 sec  68.5 MBytes  9.58 Mbits/sec  0.009 ms 6813/55685 (12%)
[  3]  0.0-60.2 sec  68.5 MBytes  9.55 Mbits/sec  0.011 ms 6710/55558 (12%)
[  3]  0.0-60.0 sec  68.5 MBytes  9.58 Mbits/sec  0.151 ms 6787/55643 (12%)
[  3]  0.0-60.2 sec  67.9 MBytes  9.47 Mbits/sec  0.008 ms 6438/54906 (12%)

there are also some peaks (151us) and the common values are less than 
the ping values.
i think iperf is no round-trip jitter - it's one way (which is more 
common, according to google recherches)

thanks Randy!

any other suggestions?

thanks

Randy Wyatt schrieb:
> markus sesser wrote:
> > Hi,
> >
> > Do anybody know how to measure delay variation (jitter) in layer2/3 
> > networks?
> > I'm looking for system- or freeware-tools to do this (no commercial 
> > tools!).
> >
> > What about normal ping test?
> > 1000 packets transmitted, 1000 received, 0% packet loss, time 9016ms
> > rtt min/avg/max/mdev = 0.194/0.207/0.326/0.015 ms
> > --> jitter should be 0.326 - 0.194 = 0.132 ?!?
> >
> > other suggestions?
> >
> > thanks,
> > markus
> What about iperf ?
>
>  http://sourceforge.net/projects/iperf
>
> Regards,
> Randy